| Cover | Nov. 03, 2021 |
| Cover [Abstract] | |
| Document Type | 8-K |
| Document Period End Date | Nov. 3, 2021 |
| Entity Registrant Name | MeridianLink, Inc. |
| Entity Incorporation, State or Country Code | DE |
| Entity File Number | 001-40680 |
| Entity Tax Identification Number | 33-0849406 |
| Entity Address, Address Line One | 1600 Sunflower Avenue, #200 |
| Entity Address, City or Town | Costa Mesa |
| Entity Address, State or Province | CA |
| Entity Address, Postal Zip Code | 92626 |
| City Area Code | 714 |
| Local Phone Number | 708-6950 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Title of 12(b) Security | Common Stock, par value $0.001 per share |
| Trading Symbol | MLNK |
| Security Exchange Name | NYSE |
| Entity Emerging Growth Company | true |
| Entity Ex Transition Period | false |
| Entity Central Index Key | 0001834494 |
| Amendment Flag | false |
